JP2008100837A - Feeder, rotation driving force transmission mechanism and liquid injection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small feeder for feeding sheets of recording paper 130 one by one. <P>SOLUTION: The small feeder comprises a first gear 210 to be rotationally driven, a second gear 220 for meshing with the first gear 210, a third gear 230 including a tooth lacking portion 235, to be frictionally driven by the second gear 220, a fourth gear 240 including a tooth lacking portion 245, to be rotated integrally with the third gear 230, a fifth gear 250 for rotating a feed shaft 252, and a locking lever 280 for restricting the rotation of the fourth gear 240 each time for rotation. With the disengagement of the locking lever 280, the first gear 210 meshes with the third gear 230 and the fourth gear 240 meshes with the fifth gear 250 to transmit the driving force of the first gear 210 to the feed shaft 252. With the engagement of the locking lever 280, the tooth lacking portion 235 of the third gear 230 faces the first gear 210 and the tooth lacking portion 245 of the fourth gear 240 faces the fifth gear 250 to cancel the mesh with each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a feeding device, a rotational driving force transmission mechanism, and a liquid ejecting apparatus. More specifically, the present invention relates to a feeding device that feeds sheet-like objects to be fed one by one, a rotational driving force transmission mechanism that is used in the feeding device, and a liquid ejecting apparatus that uses the feeding device. .

  In an apparatus that handles a sheet-like read original or a recording medium such as a facsimile, a scanner, a printer, and a copying machine, a feeding device that feeds the read original is used. This feeding device feeds sheet-like objects to be fed one by one in a stacked manner.

In Patent Document 1, a sheet feeding roller that feeds a sheet material stacked on a pressure plate by rotation, and a sheet material fed by the sheet feeding roller abuts against a slope, and the feeding roller contacts the uppermost sheet material. A paper feeding device that feeds by the frictional force is described. Also, Patent Document 2 describes a sheet feeding device in which stacked and loaded sheets are abutted against an inclined surface, and a sheet feeding roller is brought into contact with the uppermost sheet material and fed by its frictional force. ing.
JP-A-10-120218 JP 2002-87622 A

  In all of the above patent documents, the cross section of the feeding roller is D-shaped, and after the sheet material is fed, the straight portion of the D-shape is opposed to the sheet material. As a result, the feeding roller is separated from the sheet material being fed. However, when the sheet material feeding path is bent downward, the sheet material being fed may continue to contact the feeding roller. At this time, there is a problem that a force that the feeding roller pulls the sheet material, so-called back tension, is generated, and it is difficult to accurately feed the sheet material by a desired amount.

  In order to solve the above-mentioned problems, as a first embodiment of the present invention, a feeding device that feeds sheet-like objects to be fed one by one, a feeding roller that comes into contact with the objects to be fed, A first gear having a driven shaft for rotationally driving the feeding roller, a first gear having a tooth formed on the peripheral surface, and a tooth formed on the peripheral surface, and a first gear having a tooth formed on the peripheral surface A second gear that is rotated by being transmitted with a driving force by being meshed with the second gear, and that is arranged coaxially with the second gear and has teeth formed on the peripheral surface, partly including a missing tooth portion. Rotating by friction drive by the first gear, and when meshed with the first gear, the third gear that is rotated by the driving force transmitted from the first gear and partly formed on the peripheral surface including the tooth missing portion A fourth gear having teeth and rotating integrally with the third gear, and a tooth formed on the peripheral surface and meshing with the fourth gear. In this case, a fifth gear that rotates by rotating the driven shaft by driving force transmitted from the fourth gear, and a rotation restricting means that locks the rotation of the fourth gear every rotation of the fourth gear, When the locking of the fourth gear by the rotation restricting means is released, the third gear frictionally driven by the second gear meshes with the first gear, and the fourth gear meshes with the fifth gear, Is transmitted to the driven shaft via the third gear and the fourth gear, so that the material to be fed is fed by the feeding roller, and the rotation of the fourth gear is locked by the rotation restricting means. In this case, the first gear and the third gear are disengaged when the chipped portion of the third gear faces the first gear, and the chipped gear portion of the fourth gear faces the fifth gear. As a result, the meshing of the fourth gear and the fifth gear is released, and the feeding roller is free. A state of rolling the feeding device is provided. Thereby, during the period when the rotational driving force is not transmitted, the fifth gear is released from meshing with the fourth gear, so that the back tension applied to the material to be fed can be reduced. Further, since the second gear, the third gear, and the fourth gear can be arranged on the same axis, the entire apparatus can be easily downsized.

  Further, in the feeding device, the third gear has a cylindrical cavity having an axis parallel to the rotation axis of the third gear, is accommodated inside the cavity, and is arranged in the radial direction of the third gear. A friction member that is urged toward the outside of the three gears to contact the inner peripheral surface of the cavity and that engages with the second gear and rotates integrally with the second gear may be provided. Thereby, a friction drive mechanism can be formed, without enlarging the dimension of a feeder. Further, even if the outer peripheral surface of the friction member is worn by sliding, the friction force does not change due to the expansion of the friction member. Therefore, the second gear can stably drive the friction of the third gear over a long period of time.

  In the feeding device, the friction member includes a position where the rotational driving force is transmitted from the second gear and a position where the frictional member is in contact with the third gear and transmits the rotational driving force on the rotation shaft of the third gear. On the other hand, when the feed roller is forwardly rotated and feeds the object to be fed, the frictional member generates a larger frictional force than when the feed roller is in a freely rotating state. You may act on the third gear. Thereby, when the feeding operation for feeding the material to be fed is performed, a large frictional force works, and the third gear and the fourth gear can be reliably rotated. Further, when the feeding operation is not performed, the third gear and the fourth gear easily rotate, so that the feeding roller can rotate more freely.

  Further, in the feeding device, the fourth gear includes a cam that rotates integrally, and periodically rotates a hopper that presses the material to be fed toward the feeding roller when the feeding roller is driven to rotate. It may be changed. As a result, when the feeding operation is performed, the rotational driving force of the feeding roller can be reliably transmitted to the material to be fed. In addition, when the feeding operation is not performed, the back tension can be further reduced because the article to be fed is not pressed against the feeding roller.

  Further, as a second form of the present invention, the first gear having teeth formed on the peripheral surface and being driven to rotate and the teeth formed on the peripheral surface are provided on the first gear. A second gear that is rotated by being transmitted with a driving force transmitted through meshing, and a second gear that is arranged coaxially with the second gear and that includes teeth that are partially formed on the peripheral surface and include a missing tooth portion. A third gear that rotates by frictional drive and is engaged with the first gear and is rotated by the driving force transmitted from the first gear, and a tooth that is partially formed on the peripheral surface including a missing tooth portion. If there is a fourth gear that rotates integrally with the third gear and teeth formed on the peripheral surface and meshes with the fourth gear, the driving force is transmitted from the fourth gear. A fifth gear that rotates and rotates the driven shaft, and a rotation restricting means that locks the rotation of the fourth gear every rotation of the fourth gear, When the rotation restricting means locks the rotation of the fourth gear, the teeth of the third gear face the first gear so that the meshing of the first gear and the third gear is released, and the first gear When the fourth gear and the fifth gear are disengaged by the chipped gear portion of the four gears facing the fifth gear, and the fourth gear is locked by the rotation restricting means, the second gear causes friction. Rotation in which the driven third gear meshes with the first gear, the fourth gear meshes with the fifth gear, and the driving force of the first gear is transmitted to the driven shaft via the third gear and the fourth gear. A driving force transmission mechanism is provided. Thereby, the effect similar to a 1st form can be acquired.

  Furthermore, as a third embodiment of the present invention, a feeding unit that feeds sheet-like objects to be fed one by one, and a liquid that ejects liquid to the materials to be fed fed by the feeding unit An injection device, wherein a feeding unit has a feeding roller that comes into contact with a material to be fed, a driven shaft that rotationally drives the feeding roller, and teeth that are formed on a peripheral surface, and is rotationally driven. A first gear, a second gear that has teeth formed on the peripheral surface, is rotated by transmitting a driving force by meshing with the first gear, and is arranged coaxially with the second gear. If the part has teeth formed on the peripheral surface including a missing tooth part, it rotates by friction drive by the second gear, and if it is meshed with the first gear, the driving force is transmitted from the first gear. A fourth gear that rotates integrally with the third gear, and has a third gear that rotates in part and a tooth that is partially formed on the peripheral surface with a missing tooth portion. A fifth gear having teeth formed on the peripheral surface and rotating the driven shaft by being transmitted with a driving force from the fourth gear when meshed with the fourth gear; Rotation regulating means for locking the rotation of the fourth gear for each rotation of the third gear, and when the locking of the fourth gear by the rotation regulating means is released, the third gear frictionally driven by the second gear is The first gear meshes with the fourth gear, the fifth gear meshes with the fifth gear, and the driving force of the first gear is transmitted to the driven shaft via the third gear and the fourth gear, so that When the feed is fed and the rotation restricting means stops the rotation of the fourth gear, the chipped portion of the third gear faces the first gear, so that the first gear and the third gear When the meshing is released and the chipped gear portion of the fourth gear faces the fifth gear, Beauty engagement of the fifth gear is released, the liquid ejecting apparatus is provided which feeding roller is in a state to rotate freely. Thereby, the effect similar to a 1st form can be acquired.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

  FIG. 1 is a perspective view showing an internal mechanism of an ink jet recording apparatus 100 according to an embodiment of the present invention. As shown in the figure, the internal mechanism of the ink jet recording apparatus 100 is formed around a frame 110 made of plastic.

  A paper support 120 is mounted behind the frame 110. Recording paper 130 is stacked and loaded on the paper support 120. The recording paper 130 is an example of a material to be fed. A side support 122 and a slide support 124 are attached to each side portion of the paper support 120. The side support 122 and the slide support 124 abut against the side end portion of the recording paper 130 loaded on the paper support 120 to prevent the inclination thereof. The side support 122 is fixed to one side end portion of the paper support 120. In contrast, the slide support 124 can move horizontally on the paper support 120. Accordingly, even when the recording paper 130 having a different width is loaded, the slide support 124 can be moved and brought into contact with the side end portion of the recording paper 130.

  In the vicinity of the paper support 120, a feeding unit and a conveying unit are arranged. The feeding unit includes a feeding roller 253, a feeding shaft 252 and a rotational driving force transmission mechanism 200 which will be described later. The transport unit has a transport drive roller 152. In addition, a platen 170 and a discharge unit are sequentially arranged in front of the conveyance unit. Further, a cap 146 is disposed on the side of the platen 170 (on the right side in the drawing).

  The feeding unit takes in the recording paper 130 on the paper support 120 forward one by one by a feeding roller 253 that is rotationally driven by a rotational driving force transmission mechanism 200 described later. A conveyance driving roller 152 disposed immediately before the feeding unit is rotationally driven by a conveyance motor (not shown) via a conveyance driving gear 150 while the recording paper 130 is pressed by a conveyance driven roller 153 disposed immediately below the conveyance driving roller 152. Is done. As a result, the recording paper 130 is fed forward according to the rotation of the transport driving roller 152.

  The recording paper 130 taken onto the platen 170 by the feeding roller 253 further advances in accordance with the rotation of the conveyance drive roller 152, and the discharge drive roller 162 disposed below the discharge unit cover 164 and the discharge driven in front of the platen 170. It is sandwiched between the rollers 163. The discharge drive roller 162 is also rotationally driven via the discharge drive gear 160, and the recording paper 130 is discharged toward the front of the ink jet recording apparatus 100.

  On the other hand, a carriage 140 is disposed above the platen 170. The carriage 140 is guided by a guide shaft and a guide rail 112 (not shown) disposed above and below the platen 170 before and after the platen 170, and reciprocates above the platen 170. Here, on the front surface of the frame 110, a pair of pulleys 143 and a timing belt 144 stretched over the pulleys 143 are arranged. The timing belt 144 is coupled to the carriage 140. As a result, when the pulley 143 is rotationally driven by the carriage motor 145 mounted on the back surface of the frame 110, the carriage 140 is moved by being pulled by the timing belt 144 that runs horizontally between the pulleys 143.

  Further, the carriage 140 includes a recording head on the lower surface thereof. The recording head is coupled to an ink tank (not shown) via a flexible tube 141. Therefore, when the recording paper 130 is positioned on the platen 170, the ink supplied from the ink tank is ejected downward, whereby the ink can be attached to the recording paper 130 and an image can be formed.

  The flexible tube 141 is also attached with a multi-core flat cable. The flat cable transmits power and control signals to the carriage 140 and also transmits signals from sensors on the carriage 140 side.

  When the recording paper 130 is not on the platen 170, the carriage 140 moves to the home position on the cap 146. At this time, the flexible tube 141 is supported by the tube guide 142. Further, the cap 146 moves upward to hermetically seal the recording head on which the carriage 140 is mounted. Further, the inside of the cap 146 is sucked by the pump 148 via the discharge drive roller 162 when the drive motor (not shown) is reversely rotated. As a result, the nozzles of the recording head can be cleaned.

  FIG. 2 is an enlarged perspective view showing the rotational driving force transmission mechanism 200 in the feeding device installed in the ink jet recording apparatus 100. As shown in the figure, the rotational driving force transmission mechanism 200 includes a first gear 210, a second gear 220, a third gear 230, a fourth gear 240 and a fifth gear 250. As described above, the conveyance drive roller 152 is rotationally driven via the conveyance drive gear 150. The rotational driving force transmission mechanism 200 transmits the rotational driving force of the transport driving roller 152 to the feeding shaft 252 supported by the bearing portion 251 to rotate the feeding roller 253. Here, the feeding shaft 252 is an example of a driven shaft.

  The feed shaft 252 is integrally formed of metal or resin. A feed roller 253 is press-fitted into the feed shaft 252. Thereby, the feeding shaft 252 and the feeding roller 253 rotate integrally. The feeding roller 253 is made of rubber, for example. Further, instead of the feeding shaft 252 and the feeding roller 253 being separate and press-fitted, the feeding shaft 252 and the feeding roller 253 may be integrally formed.

  Since the feeding roller 253 feeds the recording paper 130 on the paper support 120 one by one to the ink jet recording apparatus 100 by its rotation, it is required to rotate intermittently at an appropriate timing. Accordingly, the train wheel formed by the first gear 210, the second gear 220, the third gear 230, the fourth gear 240, and the fifth gear 250 is required to intermittently transmit the rotational driving force. Further, during a period in which the rotational driving force is not transmitted, it is required that the recording paper 130 is easily loaded on the paper support 120 and that no back tension is generated on the conveyed recording paper 130. Therefore, it is preferable that the feeding roller 253 can be freely rotated during a period in which the rotational driving force is not transmitted.

  FIG. 3 is a diagram showing extracted parts involved in the transmission of the rotational driving force in the rotational driving force transmission mechanism 200. As shown in the figure, in this rotational driving force transmission mechanism 200, the rotational driving force is transmitted from the first gear 210 to the fifth gear 250.

  Here, the first gear 210 rotates integrally with the transport driving roller 152. Accordingly, the first gear 210 is rotationally driven by the transport motor via the transport drive roller 152. The first gear 210 has a thickness that meshes with both the second gear 220 and the third gear 230. As will be described later, since the second gear 220 and the third gear 230 may simultaneously mesh with the first gear 210, the second gear 220 and the third gear 230 have the same diameter, number of teeth, and pitch. On the other hand, the fourth gear 240 does not mesh with the first gear 210 but meshes with the fifth gear 250 to transmit the rotational driving force.

  Further, the second gear 220, the third gear 230, and the fourth gear 240 disposed between the first gear 210 and the fifth gear 250 are disposed so as to be coaxial with each other. The second gear 220 is a separate component with respect to the third gear 230 and the fourth gear 240 and can rotate independently. On the other hand, the third gear 230 and the fourth gear 240 are integrally formed and rotate integrally.

  Further, the fourth gear 240 includes a cam 244 integrally formed on the side surface thereof, and a locking pin 242 formed to project laterally on the side surface of the cam 244. The rotational driving force transmission mechanism 200 has a hopper lever 270 and a locking lever 280. One end of the hopper lever 270 is pivotally supported, and the other end contacts the cam 244. In addition, one end of the locking lever 280 is pivotally supported, and the other end abuts or separates from the locking pin 242.

  The hopper lever 270 swings according to the radial thickness of the cam 244 as the cam 244 rotates. For this reason, the hopper lever 270 is always urged by the urging means (not shown) so as to abut against the cam 244. By this swinging of the hopper lever 270, the hopper 121 mounted on the same shaft as the hopper lever 270 changes the tip, and the recording paper 130 on the paper support 120 is moved up and down. When the hopper 121 is raised, the recording paper 130 on the paper support 120 is pressed against the feeding roller 253. The operation of the locking lever 280 will be described later.

  FIG. 4 is a diagram illustrating meshing of the first gear 210 and the second gear 220 in the initial state of the rotational driving force transmission mechanism 200. As shown in the figure, the second gear 220 is always meshed with the first gear 210 and continues to rotate as the first gear 210 rotates. As will be described later, since the second gear 220 slides with respect to the third gear 230, the second gear 220 can continue to rotate independently even when the third gear 230 does not rotate.

  FIG. 5 is a diagram showing the meshing relationship between the first gear 210 and the third gear 230 in the initial state of the rotational driving force transmission mechanism 200 and the structure of the friction drive mechanism 290 incorporated in the third gear 230. As shown in the figure, the third gear 230 has a chipped portion 235 in a part of its tooth portion. In the initial state of the rotational driving force transmission mechanism 200, the missing tooth portion 235 faces the first gear 210. Thereby, the first gear 210 and the third gear 230 are not meshed, and the rotational driving force is not transmitted. On the other hand, as will be described later, when the third gear 230 is rotated by friction drive by the second gear 220, the third gear 230 meshes with the first gear 210.

  The third gear 230 is mounted so as to be individually rotatable with respect to the second gear 220, but is frictionally driven by the second gear 220 via the friction drive mechanism 290. The friction drive mechanism 290 is formed including a friction member 292 housed in a cavity 232 formed inside the third gear 230. The friction member 292 is biased by the spring 294 so as to expand in the radial direction of the third gear 230 and presses the outer peripheral surface thereof against the inner surface of the cavity portion 232. Further, the friction member 292 is formed with an engagement groove 296, and a protrusion (not shown) protruding from the side surface of the second gear 220 to the side is inserted.

  Thereby, the friction member 292 rotates integrally with the second gear 220. This rotation is transmitted to the third gear 230 by friction between the peripheral surface of the friction member 292 and the inner surface of the cavity 232. Even if the outer peripheral surface of the friction member 292 is worn by sliding, the friction force is not changed by the expansion of the friction member 292 by the spring 294. As a result, the second gear 220 can frictionally drive the third gear 230 stably over a long period of time.

  Further, as illustrated, the engagement groove 296 is disposed asymmetrically with respect to the spring 294 with respect to the rotation shaft of the third gear 230. Since the position where the frictional force acts greatly and the position where the rotational driving force is transmitted from the second gear 220 are asymmetrical, the third gear 230 rotates forward, and the rotational driving force transmission mechanism 200 is fed by the feeding roller. When 253 is rotated, a larger frictional force acts than when the rotational driving force is interrupted. Therefore, when the third gear 230 rotates in reverse for some reason, the frictional force acting on the second gear 220 is reduced. Further, since the pump 148 is driven when the conveyance motor (not shown) is reversed, the conveyance drive roller 152, the first gear 210, and the second gear 220 are reversed. Since the frictional load between the second gear 220 and the third gear 230 at this time can be reduced, it is possible to reduce the load of a conveyance motor (not shown) when the pump 148 is driven.

  When the rotation of the third gear 230 is not stopped by the friction drive mechanism 290 as described above, the third gear 230 is rotated by the second gear 220. On the other hand, even when the rotation of the third gear 230 is stopped, the second gear 220 can continue to rotate.

  FIG. 6 is a diagram showing the relationship between the locking pin 242 and the locking lever 280 of the fourth gear 240 in the initial state. As shown in the figure, when one end of the locking lever 280 is raised, the locking groove 282 formed in the locking lever 280 is engaged with the locking pin 242 of the fourth gear 240, and the fourth The rotation of the gear 240 is locked. The third gear 230 integrated with the fourth gear 240 is also locked from rotating.

  The fourth gear 240 has a missing tooth portion 245 at a position different from the missing tooth portion 235 of the third gear 230. In this initial state, the missing tooth portion 245 of the fourth gear 240 faces the fifth gear 250, and the transmission of the rotational driving force due to the meshing of both is interrupted. As will be described later, when the fourth gear 240 rotates, the fourth gear 240 and the fifth gear 250 mesh with each other, and the rotation of the fourth gear 240 is transmitted to the fifth gear 250. Since the fifth gear 250 rotates integrally with the feeding shaft 252 and the feeding roller 253, when the rotation of the fourth gear 240 is transmitted to the fifth gear 250, the feeding roller 253 also rotates.

  Thus, in the initial state, the second gear 220 frictionally drives the third gear 230 while being rotated by the first gear 210. However, the rotation of the third gear 230 is restricted by the locking lever 280 via the fourth gear 240 and the locking pin 242. Further, since the chipped portion 235 of the third gear 230 faces the first gear 210, the first gear 210 and the third gear 230 are not engaged with each other. Furthermore, since the chipped portion 245 of the fourth gear 240 faces the fifth gear 250, the fourth gear 240 and the fifth gear 250 are not meshed.

  FIG. 7 is a cross-sectional view showing an initial state of the rotational driving force transmission mechanism 200 in the ink jet recording apparatus 100 on the surface including the third gear 230. As shown in the figure, the recording paper 130 is stacked and loaded on the paper support 120 in a state where it strikes the separation slope 260 at the lower end (left end in the figure) of the paper support 120. At this time, since the chipped portion 235 of the third gear 230 faces the first gear 210, the first gear 210 and the third gear 230 are not meshed.

  FIG. 8 is a cross-sectional view showing an initial state of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270. As shown in the figure, the hopper lever 270 is in a state where the cam 244 is in contact with a thick portion in the radial direction and is lowered in its operating range.

  FIG. 9 is a cross-sectional view showing an initial state of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen. As shown in the figure, since the hopper lever 270 is lowered, the hopper 121 is also lowered. For this reason, the recording paper 130 is separated from the feeding roller 253.

  FIG. 10 is a cross-sectional view showing an initial state of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280. As shown in the drawing, since one end (left end in the figure) of the locking lever 280 is raised, the locking groove 282 is fitted with the locking pin 242. Thereby, the rotation of the fourth gear 240 and the third gear 230 integrated therewith is stopped.

  FIG. 11 is a cross-sectional view showing an initial state of the rotational driving force transmission mechanism 200 on the surface including the fourth gear 240 and the fifth gear 250. As shown in the figure, since the chipped portion 245 of the fourth gear 240 faces the fifth gear 250, the fourth gear 240 and the fifth gear 250 are not engaged with each other. Therefore, in this state, the feed shaft 252 and the feed roller 253 coupled to the fifth gear 250 can freely rotate. In other words, in this state, the hopper 121 is lowered and separated from the feeding roller 253, and the feeding roller 253 can freely rotate, so that the recording paper 130 can be loaded on the paper support 120.

  Hereinafter, the operation of the rotational driving force transmission mechanism 200 will be described in order from the first operation stage to the tenth operation stage. The drawings referred to at each stage in the following description have the correspondence shown in Table 1 below.

Table 1
(1) (2) (3) (4) (5)
Initial state: Fig. 7-Fig. 8-Fig. 9-Fig. 10-Fig. 11
First operation stage: FIG. 12-FIG. 13-FIG. 14-FIG. 15-FIG.
Second Operation Stage: FIGS. 19-20, 21-22, 23-23
Third operation stage: FIGS. 25-26-27-28-29
Fourth operation stage: FIGS. 30-31-32-33-34
Fifth Operation Stage: FIGS. 35-36-37-38-39
Sixth Operation Stage: FIGS. 40-41-42-43-44-45
Seventh Operation Stage: FIGS. 46-47-48-49-50
Eighth Operation Stage: FIGS. 51-52-53-54-55
Ninth Operation Stage: FIGS. 56-57-58-59-60-61-62
Tenth Operation Stage: FIGS. 63-64-65-66-67-68
Here, (1) shows a cross-sectional view shown in a plane including the third gear 230. Similarly, (2) shows a cross-sectional view shown in the plane including the cam 244 and the hopper lever 270. (3) is a cross-sectional view shown on the surface where the hopper 121 can be seen, (4) is a cross-sectional view shown on the surface including the locking lever 280, and (5) is the fourth gear 240 and the fifth gear 250. Sectional drawing shown in the surface containing is shown.

  FIG. 12 is a perspective view showing the positional relationship between the components at the start of the first operation stage of the rotational driving force transmission mechanism 200. As shown in the figure, when the rotational driving force transmission mechanism 200 starts to feed the recording paper 130, first, the locking lever 280 lowers the tip, and the locking groove 282 and the locking pin 242 are moved. Unmating. As a result, the third gear 230 and the fourth gear 240 can be rotated.

  The locking lever 280 is driven by the carriage 140 via a link (not shown). That is, the carriage 140 is moved from the home position, moved onto the platen 170, and the locking lever 280 is rotated when the normal operation range including the printing range is exceeded. Thereby, the feeding of the recording paper 130 is started immediately before the ink ejection by the carriage 140 is started.

  FIG. 13 is a cross-sectional view showing the first operation stage of the rotational driving force transmission mechanism 200 as described above in the plane including the third gear 230 in contrast to FIG. As shown in the figure, at this time point, the third gear 230 is not meshed with the first gear 210 because the chipped portion 235 faces the first gear 210. However, as will be described later, the third gear 230 starts to rotate by friction drive by the second gear 220. The state shown in FIG. 13 is not changed from the initial state shown in FIG. 7 except that the third gear 230 is slightly rotated.

  FIG. 14 is a cross-sectional view showing the first operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270, as opposed to FIG. As shown in the figure, the state of the cam 244 and the hopper lever 270 also appears to be unchanged from the state shown in FIG. 8 except that the cam 244 has slightly rotated. However, in the first operation stage, the locking by the locking lever 280 and the locking pin 242 is released, the third gear 230 and the fourth gear 240 can be rotated, and the third gear 230 is in the second state. The gear 220 is frictionally driven. Accordingly, the fourth gear 240 and the cam 244 that rotate integrally with the third gear 230 also start to rotate in the direction indicated by the arrow in the drawing.

  FIG. 15 is a cross-sectional view showing the first operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. As shown in the figure, at this time, the hopper lever 270 is not raised again, and the recording paper 130 is separated from the feeding roller 253. This state is not changed from the initial state shown in FIG.

  FIG. 16 is a cross-sectional view showing the first operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 in contrast to FIG. As shown in the figure, the tip of the locking lever 280 is lowered, and the locking groove 282 and the locking pin 242 are separated from each other. Thereby, the 4th gear 240 and the 3rd gear 230 which were cancelled | released will be in the state which can rotate.

  FIG. 17 is a cross-sectional view showing the first operation stage of the rotational driving force transmission mechanism 200 in the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. As shown in the figure, since the chipped portion 245 of the fourth gear 240 faces the fifth gear 250, the fourth gear 240 and the fifth gear 250 are not engaged with each other. Accordingly, at this stage, the feeding roller 253 coupled to the fifth gear 250 is in a state where it can freely rotate.

  FIG. 18 is a perspective view showing the positional relationship between components at the end of the first operation stage. As shown in the figure, since the locking pin 242 is shifted when the fourth gear 240 begins to rotate, the locking pin 242 and the locking pin 242 return until the locking pin 242 returns to its original position. The locking groove 282 is not fitted. In other words, the locking pin 242 and the locking lever 280 stop the rotation every time the fourth gear 240 rotates once.

  In addition, since the third gear 230 and the fourth gear 240 start to rotate, the notches 235 and 245 move, and the first gear 210 and the third gear 230, and the fourth gear 240 and the fifth gear 250 move. , Each begins to bite. Accordingly, the rotational driving force is transmitted from the first gear 210 to the fifth gear 250 by the gears meshed with each other.

  FIG. 19 is a cross-sectional view showing the second operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. As shown in the figure, the first gear 210 and the third gear 230 mesh with each other, and the rotational driving force of the first gear 210 is reliably transmitted to the third gear 230. As described above, in the second operation stage, the first gear 210 and the third gear 230, the fourth gear 240 and the fifth gear 250 are engaged with each other, and the rotational driving force of the transport driving roller 152 is applied to the feeding shaft 252 and the feeding gear. It is transmitted to the feed roller 253.

  When the first gear 210 and the third gear 230 start to mesh with each other, the teeth of both may collide with each other. Therefore, it is preferable to provide a clearance groove 236 under the tooth adjacent to the missing tooth portion 235 to smoothly mesh the teeth.

  FIG. 20 is a cross-sectional view showing the second operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270, in contrast to FIG. As shown in the figure, the cam 244 also rotates with the rotation of the third gear 230 and the fourth gear 240, and the tip of the hopper lever 270 contacts just before the step on the surface of the cam 244.

  FIG. 21 is a cross-sectional view showing the second operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. As shown in the previous figure, since the hopper lever 270 has not yet changed, the hopper 121 has not yet moved up. Therefore, this state is not substantially changed from the initial state shown in FIG.

  FIG. 22 is a cross-sectional view showing the second operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 in contrast to FIG. As shown in the figure, since the fourth gear 240 starts to rotate, the position of the locking pin 242 is shifted from the position of the locking groove 282 of the locking lever 280. Therefore, the locking lever 280 does not engage with the locking pin 242 until the fourth gear 240 rotates once and the locking pin 242 returns to the original position.

  FIG. 23 is a cross-sectional view showing the second operation stage of the rotational driving force transmission mechanism 200 in the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. As shown in the figure, the fourth gear 240 and the fifth gear 250 mesh with each other, and the rotational driving force of the fourth gear 240 is reliably transmitted to the fifth gear 250.

  Further, when the fourth gear 240 and the fifth gear 250 start to mesh with each other, the teeth of both may collide with each other. Therefore, in the fourth gear 240 as well, it is preferable to provide a relief groove 246 under the tooth adjacent to the missing tooth portion 245 so that the teeth are smoothly meshed.

  FIG. 24 is a perspective view showing the positional relationship between the components in the second operation stage. As shown in the figure, the fourth gear 240 is further rotated, and the contact portion at the tip of the hopper lever 270 drops the step formed on the peripheral surface of the cam 244. As a result, the hopper lever 270 is raised and the hopper 121 is raised.

  FIG. 25 is a cross-sectional view showing the third operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. As shown in the figure, the first gear 210 and the third gear 230 continue to mesh with each other, and the third gear 230 further rotates as the first gear 210 rotates.

  FIG. 26 is a cross-sectional view showing the third operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. As shown in the figure, the fourth gear 240 and the cam 244 rotate with the rotation of the third gear 230. As a result, the tip of the hopper lever 270 falls on the step formed on the peripheral surface of the cam 244. Accordingly, the hopper lever 270 itself also changes.

  FIG. 27 is a cross-sectional view showing the third operation stage of the rotational driving force transmission mechanism 200 in contrast to FIG. As shown in the figure, the hopper 121 is raised by the movement of the hopper lever 270. As a result, the recording paper 130 on the paper support 120 is lifted by the hopper 121 and pressed against the feeding roller 253.

  FIG. 28 is a cross-sectional view showing the third operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 in contrast to FIG. As shown in the figure, the locking pin 242 of the fourth gear 240 moves away from the locking lever 280 as the fourth gear 240 rotates, so that the locking pin 242 and the locking groove 282 are not fitted.

  FIG. 29 is a cross-sectional view showing the third operation stage of the rotational driving force transmission mechanism 200 in the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. As shown in the figure, the fourth gear 240 meshes with the fifth gear 250 and rotationally drives it. As a result, the feed roller 253 is also rotationally driven via the feed shaft 252. As described with reference to FIG. 27, since the recording paper 130 is pressed against the feeding roller 253 by the hopper 121, the lower end thereof is strongly pressed against the separation slope 260 as the feeding roller 253 rotates.

  FIG. 30 is a cross-sectional view showing the fourth operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. As shown in the drawing, the first gear 210 and the third gear 230 still keep meshing, and the third gear 230 further rotates.

  FIG. 31 is a cross-sectional view showing the fourth operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. As shown in the figure, the tip of the hopper lever 270 is in contact with a section where the cam 244 has a small radial thickness. Accordingly, the hopper lever 270 maintains the raised state.

  FIG. 32 is a cross-sectional view showing the fourth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. As shown in the figure, since the hopper lever 270 continues to maintain the raised state as described above, the hopper 121 also continues to rise. Accordingly, the state in which the recording sheet 130 is pressed against the feeding roller 253 is also continued. As a result, one recording sheet 130 positioned at the uppermost layer passes over the separation slope 260 and is sent out toward the transport driving roller 152. Note that the angle of the separation slope 260 with respect to the recording paper 130 is set so that only one uppermost recording paper 131 gets over in consideration of the bending rigidity of the recording paper 130.

  FIG. 33 is a cross-sectional view showing the fourth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 in contrast to FIG. As shown in the figure, the locking pin 242 of the fourth gear 240 moves further away from the locking lever 280 as the fourth gear 240 rotates, so that the locking pin 242 and the locking groove 282 are not fitted. .

  FIG. 34 is a cross-sectional view showing the fourth operation stage of the rotational driving force transmission mechanism 200 in the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. As shown in the figure, the fourth gear 240 and the fifth gear 250 still maintain meshing. As a result, the feeding roller 253 also continues to rotate and continues to feed the pressed recording paper 131.

  FIG. 35 is a cross-sectional view showing the fifth operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. As shown in the figure, the meshing of the first gear 210 and the third gear 230 is still maintained, and the third gear 230 further rotates.

  FIG. 36 is a cross-sectional view showing the fifth operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. As shown in the figure, the diameter of the cam 244 that contacts the hopper lever 270 remains unchanged, and the hopper lever 270 maintains the raised position.

  FIG. 37 is a cross-sectional view showing the fifth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. As shown in the figure, the hopper 121 is also raised by the hopper lever 270 that continues to rise, and the recording paper 131 continues to be pressed against the feeding roller 253, so that the uppermost recording paper 131 is further fed out and conveyed. It reaches just before the nip point between the driving roller 152 and the conveyance driven roller 153.

  FIG. 38 is a cross-sectional view showing the fifth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 in contrast to FIG. As shown in the figure, the locking pin 242 of the fourth gear 240 passes through the farthest point from the locking lever 280 but is still separated from the locking lever 280. Therefore, the locking pin 242 and the locking groove 282 are not fitted.

  FIG. 39 is a cross-sectional view showing the fifth operation stage of the rotational driving force transmission mechanism 200 in the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. As shown in the figure, the meshing of the fourth gear 240 and the fifth gear 250 continues. Accordingly, the feeding roller 253 is also driven to rotate and continues to rotate.

  FIG. 40 is a cross-sectional view showing the sixth operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. As shown in the figure, the meshing of the first gear 210 and the third gear 230 continues. However, the chipped portion 235 of the third gear 230 is approaching the meshing position of the first gear 210 and the third gear 230.

  FIG. 41 is a cross-sectional view showing the sixth operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. As shown in the figure, as shown in the figure, the radial thickness of the cam 244 gradually increases from this stage. Accordingly, the hopper lever 270 is gradually pushed down by the cam 244 as the fourth gear 240 rotates.

  FIG. 42 is a cross-sectional view showing the sixth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. As shown in the figure, at this stage, the leading edge of the recording paper 131 is sandwiched between the transport driving roller 152 and the transport driven roller 153 and begins to be sent out toward the platen 170. On the other hand, as the hopper lever 270 is pushed down by the cam 244, the hopper 121 starts to descend. However, at this stage, the feeding roller 253 continues to feed the recording paper 131.

  Note that when the conveyance of the recording paper 131 by the conveyance driving roller 152 and the conveyance driven roller 153 is started, the feeding by the feeding roller 253 also acts on the recording paper 131 at the same time. However, by setting the transport speed by the transport drive roller 152 and the paper feed speed by the feed roller 253 to be equal, no transport failure occurs.

  FIG. 43 is a cross-sectional view showing the sixth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 in contrast to FIG. As shown in the figure, the locking pin 242 is approaching the locking lever 280 but is still separated from the locking lever 280.

  FIG. 44 is a cross-sectional view showing the sixth operation stage of the rotational driving force transmission mechanism 200 in the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. As shown in the figure, the fourth gear 240 is still in mesh with the fifth gear 250. Accordingly, the feeding roller 253 continues to rotate.

  FIG. 45 is a perspective view showing the positional relationship between components in the sixth operation stage. As shown in the figure, the tip of the hopper lever 270 starts to climb the circumferential surface of the cam 244 whose diameter gradually increases. As a result, the hopper 121 starts to descend as described above.

  FIG. 46 is a cross-sectional view showing the seventh operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. As shown in the figure, the meshing of the first gear 210 and the third gear 230 continues even in the seventh operation stage.

  FIG. 47 is a cross-sectional view showing the seventh operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. As shown in the figure, the hopper lever 270 continues to climb the cam 244 and drops significantly.

  FIG. 48 is a cross-sectional view showing the seventh operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. As shown in the figure, the hopper 121 is also lowered according to the lowered hopper lever 270. As a result, the recording paper 130 starts to be separated from the feeding roller 253, and the rotation of the feeding roller 253 starts to not be transmitted to the recording paper 130.

  49 is a cross-sectional view showing the seventh operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280, in contrast to FIG. As shown in the figure, the locking pin 242 is still separated from the locking lever 280.

  FIG. 50 is a cross-sectional view showing the seventh operation stage of the rotational driving force transmission mechanism 200 in the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. As shown in the figure, the meshing of the fourth gear 240 and the fifth gear 250 continues, and the feeding roller 253 continues to rotate. However, as already described, since the hopper 121 is lowered and the recording paper 130 is being separated, the contribution of the feeding roller 253 to the feeding of the recording paper 130 is reduced.

  FIG. 51 is a cross-sectional view showing the eighth operation stage of the rotational driving force transmission mechanism 200 in contrast to FIG. 46 in the plane including the third gear 230. As shown in the figure, the first gear 210 and the third gear 230 are still engaged. However, the chipped portion 235 of the third gear 230 approaches the position close to the meshing position of the first gear 210 and the third gear 230.

  FIG. 52 is a cross-sectional view showing the eighth operation stage of rotational driving force transmission mechanism 200 in the plane including cam 244 and hopper lever 270, as opposed to FIG. As shown in the figure, the hopper lever 270 comes into contact with the portion of the cam 244 where the radial thickness is large, and is almost lowered.

  FIG. 53 is a cross-sectional view showing the eighth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. As shown in the figure, as the hopper lever 270 is lowered, the hopper 121 is also substantially lowered. As a result, the recording paper 130 is completely separated from the feeding roller 253. Note that the recording paper 130 conveyed to the conveyance driving roller 152 and the conveyance driven roller 153 reaches the platen 170, and the conveyance of the recording paper 130 from here on is controlled mainly by the rotation of the conveyance driving roller 152.

  FIG. 54 is a cross-sectional view showing the eighth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280, in contrast to FIG. As shown in the figure, the locking pin 242 starts to contact the locking lever 280, but has not yet reached the position of the locking groove 282, and the rotation of the fourth gear 240 is not yet locked.

  FIG. 55 is a cross-sectional view showing the eighth operation stage of the rotational driving force transmission mechanism 200 in the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. As shown in the figure, the fourth gear 240 and the fifth gear 250 are still engaged. However, the chipped portion 245 of the fourth gear 240 approaches the position immediately close to the meshing position of the fourth gear 240 and the fifth gear 250.

  FIG. 56 is a cross-sectional view showing the ninth operation stage of the rotational driving force transmission mechanism 200 in contrast to FIG. 51 in the plane including the third gear 230. As shown in the figure, the chipped portion 235 of the third gear 230 reaches the meshing position of the first gear 210 and the third gear 230, and the meshing of the first gear 210 and the third gear 230 is released. However, the third gear 230 continues to rotate by being frictionally driven by the second gear 220. Therefore, it rotates until the chipped portion 235 of the third gear 230 faces the first gear 210.

  FIG. 57 is a cross-sectional view showing the ninth operation stage of rotational driving force transmission mechanism 200 on the surface including cam 244 and hopper lever 270, as contrasted with FIG. As shown in the figure, the hopper lever 270 is in contact with a large diameter portion of the cam 244 and is lowered.

  FIG. 58 is a cross-sectional view showing the ninth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. As shown in the figure, as the hopper lever 270 is lowered, the hopper 121 is also kept lowered.

  FIG. 59 is a cross-sectional view showing the ninth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280, in contrast to FIG. As shown in the figure, the locking pin 242 comes to the immediate vicinity of the locking groove 282 of the locking lever 280.

  FIG. 60 is a cross-sectional view showing the ninth operation stage of the rotational driving force transmission mechanism 200 in the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. As shown in the figure, the chipped portion 245 of the fourth gear 240 reaches the meshing position of the fourth gear 240 and the fifth gear 250, and the meshing of the fourth gear 240 and the fifth gear 250 is released. As a result, the back tension with respect to the fed recording paper 131 is also eliminated. However, the fourth gear 240 continues to rotate by being frictionally driven by the second gear 220 together with the third gear 230. Accordingly, the chipped portion 245 of the fourth gear 240 rotates until it faces the fifth gear 250.

  FIG. 61 is a perspective view showing the positional relationship between components in the ninth operation stage. As shown in the drawing, the locking pin 242 of the fourth gear 240 approaches the locking groove 282 of the locking lever 280. In other words, the rotation of the fourth gear 240 is not yet locked. Further, the hopper lever 270 is pushed down by the cam 244 and fully lowered. Accordingly, the hopper 121 is also lowered. Further, the chipped portion 245 of the fourth gear 240 faces the fifth gear 250. Thereby, the meshing of the fourth gear 240 and the fifth gear 250 is released.

  FIG. 62 is a perspective view showing the positional relationship between components viewed from another angle in the eighth operation stage. As shown in the figure, the chipped portion 235 of the third gear 230 faces the first gear 210. Thereby, the meshing of the first gear 210 and the third gear 230 is released.

  FIG. 63 is a cross-sectional view showing the tenth operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. As shown in the figure, the chipped portion 235 of the third gear 230 faces the first gear 210, and the meshing of the first gear 210 and the third gear 230 is released. The third gear 230 is energized by the friction drive from the second gear 220, but stops rotating by being locked by a locking lever 280 described later.

  FIG. 64 is a cross-sectional view showing the tenth operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. As shown in the figure, the hopper lever 270 is pushed down by the cam 244. As will be described later, since the rotation of the fourth gear 240 is locked, the hopper lever 270 continues to maintain this state.

  FIG. 65 is a cross-sectional view showing the tenth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. As shown in the figure, the hopper 121 also maintains the lowered state according to the hopper lever 270 that maintains the lowered state. Therefore, the state where the recording paper 130 is not fed is maintained.

  FIG. 66 is a cross-sectional view showing the tenth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280, in contrast to FIG. As shown in the figure, the locking pin 242 of the fourth gear 240 and the locking groove 282 of the locking lever 280 are fitted. Thereby, the rotation of the fourth gear 240 is locked. Further, the rotation of the third gear 230 integral with the fourth gear 240 is also locked.

  FIG. 67 is a cross-sectional view showing the tenth operation stage of rotational driving force transmission mechanism 200 in the plane including fourth gear 240 and fifth gear 250, in contrast to FIG. As shown in the figure, the chipped portion 245 of the fourth gear 240 faces the fifth gear 250. Accordingly, the meshing of the fourth gear 240 and the fifth gear 250 is released, and the fifth gear 250 is in a state where it can freely rotate. Thereby, the feeding shaft 252 and the feeding roller 253 that rotate integrally with the fifth gear 250 are also in a state where they can freely rotate.

  FIG. 68 is a perspective view showing the positional relationship between components in the tenth operation stage. As shown in the figure, the locking pin 242 of the fourth gear 240 is fitted in the locking groove 282 of the locking lever 280. Thereby, the rotation of the fourth gear 240 and the third gear 230 integral with the fourth gear 240 is locked.

  As already described, the meshing of the first gear 210 and the third gear 230 and the fourth gear 240 and the fifth gear 250 is released. Therefore, this state is maintained until the locking lever 280 is moved and the engagement between the locking pin 242 and the locking groove 282 is released. Further, in this state, since the meshing of the fourth gear 240 and the fifth gear 250 is released, the fifth gear 250, the feeding shaft 252 and the feeding roller 253 are in a state where they can freely rotate again.

  As described above, according to the present embodiment, the fifth gear 250 is released from meshing with the fourth gear 240 during a period in which the rotational driving force is not transmitted, so that the back tension applied to the recording paper 1310 being fed is reduced. Can be small. As shown in FIG. 58, when the recording paper 131 is bent and supplied to the conveyance drive roller 152, the feeding roller 253 guides the recording paper 131 in a rotatable manner, so that the recording paper is smoother. 131 can be sent. Furthermore, since the second gear 220, the third gear 230, and the fourth gear 240 can be arranged coaxially, the entire apparatus can be easily downsized.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

1 is a perspective view showing an internal mechanism of an ink jet recording apparatus 100 according to an embodiment. 2 is an enlarged perspective view showing a rotational driving force transmission mechanism 200 in a feeding device equipped in the ink jet recording apparatus 100. FIG. It is a figure which extracts and shows the movable component of the rotational driving force transmission mechanism. The meshing of the first gear 210 and the second gear 220 in the initial state is shown. It is a figure which shows the structure of the friction drive mechanism 290 integrated in the 3rd gearwheel 230 in the initial state. The relationship between the 4th gearwheel 240 and the latching lever 280 in an initial state is shown. FIG. 6 is a cross-sectional view showing an initial state of the rotational driving force transmission mechanism 200 on a surface including a third gear 230. 7 is a cross-sectional view showing an initial state of the rotational driving force transmission mechanism 200 on a surface including the cam 244 and the hopper lever 270. It is sectional drawing which shows the initial state of the rotational drive force transmission mechanism 200 in the surface where the hopper 121 can be seen. 6 is a cross-sectional view showing an initial state of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280. FIG. FIG. 6 is a cross-sectional view showing an initial state of the rotational driving force transmission mechanism 200 on the surface including the fourth gear 240 and the fifth gear 250. The positional relationship between components in the initial state is shown. FIG. 8 is a cross-sectional view showing the first operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. 7. FIG. 9 is a cross-sectional view showing a first operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. 8. FIG. 10 is a cross-sectional view showing the first operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. 9. FIG. 11 is a cross-sectional view showing a first operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 as compared with FIG. FIG. 12 is a cross-sectional view showing a first operation stage of the rotational driving force transmission mechanism 200 on the plane including the fourth gear 240 and the fifth gear 250 as compared to FIG. 11. It is a perspective view which shows the positional relationship between each component in a 1st operation | movement stage. FIG. 14 is a cross-sectional view showing a second operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. 13. FIG. 15 is a cross-sectional view showing a second operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. 14. FIG. 16 is a cross-sectional view showing the second operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. 15. FIG. 17 is a cross-sectional view showing a second operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 in contrast to FIG. 16. FIG. 18 is a cross-sectional view showing the second operation stage of the rotational driving force transmission mechanism 200 on the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. 17. It is a perspective view which shows the positional relationship between each component in a 2nd operation | movement stage. FIG. 20 is a cross-sectional view showing the third operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. 19. FIG. 21 is a cross-sectional view showing a third operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. 20. FIG. 22 is a cross-sectional view showing a third operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. 21. FIG. 23 is a cross-sectional view showing a third operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 as compared with FIG. 22. FIG. 24 is a cross-sectional view showing a third operation stage of the rotational driving force transmission mechanism 200 on the plane including the fourth gear 240 and the fifth gear 250 in contrast to FIG. 23. FIG. 26 is a cross-sectional view showing a fourth operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. 25. FIG. 27 is a cross-sectional view showing a fourth operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. 26. FIG. 28 is a cross-sectional view showing a fourth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. 27. FIG. 29 is a cross-sectional view showing a fourth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 as compared with FIG. 28. FIG. 30 is a cross-sectional view showing a fourth operation stage of the rotational driving force transmission mechanism 200 on the surface including the fourth gear 240 and the fifth gear 250 in contrast to FIG. 29. FIG. 31 is a cross-sectional view showing a fifth operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. 30. FIG. 32 is a cross-sectional view showing a fifth operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. 31. FIG. 33 is a cross-sectional view showing a fifth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. 32. It is sectional drawing which shows the 5th operation | movement stage of the rotational drive force transmission mechanism 200 in the surface containing the latching lever 280 with respect to FIG. FIG. 35 is a cross-sectional view showing a fifth operation stage of the rotational driving force transmission mechanism 200 on the surface including the fourth gear 240 and the fifth gear 250 in contrast to FIG. 34. FIG. 36 is a cross-sectional view showing the sixth operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. FIG. 37 is a cross-sectional view showing a sixth operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 as compared with FIG. 36. It is sectional drawing which shows the 6th operation | movement stage of the rotational driving force transmission mechanism 200 in contrast with FIG. 37 in the surface which can see the hopper 121. FIG. FIG. 39 is a cross-sectional view showing a sixth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 as compared with FIG. 38. FIG. 40 is a cross-sectional view showing a sixth operation stage of the rotational driving force transmission mechanism 200 on the surface including the fourth gear 240 and the fifth gear 250 as compared to FIG. 39. It is a perspective view which shows the positional relationship between each component in a 6th operation | movement stage. FIG. 41 is a cross-sectional view showing the seventh operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. 40. FIG. 42 is a cross-sectional view showing a seventh operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 as compared with FIG. 41. FIG. 43 is a cross-sectional view showing a seventh operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. 42. FIG. 44 is a cross-sectional view showing a seventh operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 in contrast to FIG. 43. FIG. 45 is a cross-sectional view showing a seventh operation stage of the rotational driving force transmission mechanism 200 on the surface including the fourth gear 240 and the fifth gear 250 in contrast to FIG. 44. FIG. 47 is a cross-sectional view showing the eighth operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. 46. FIG. 48 is a cross-sectional view showing the eighth operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270, in contrast to FIG. FIG. 49 is a cross-sectional view showing an eighth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. 48. FIG. 50 is a cross-sectional view showing an eighth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 as compared with FIG. 49. FIG. 51 is a cross-sectional view showing the eighth operation stage of the rotational driving force transmission mechanism 200 on the surface including the fourth gear 240 and the fifth gear 250 in contrast to FIG. 50. FIG. 52 is a cross-sectional view showing a ninth operation stage of rotational drive force transmission mechanism 200 in the plane including third gear 230 in contrast to FIG. 51. FIG. 53 is a cross-sectional view showing a ninth operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 as compared with FIG. 52. FIG. 54 is a cross-sectional view showing the ninth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 can be seen, in contrast to FIG. 53. FIG. 55 is a cross-sectional view showing a ninth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 as compared with FIG. 54. FIG. 56 is a cross-sectional view showing a ninth operation stage of the rotational driving force transmission mechanism 200 on the surface including the fourth gear 240 and the fifth gear 250 in contrast to FIG. 55. It is a perspective view which shows the positional relationship between each component in a 7th operation | movement stage. It is a perspective view which shows the positional relationship between each component in an 8th operation | movement stage. FIG. 57 is a cross-sectional view showing the tenth operation stage of the rotational driving force transmission mechanism 200 in the plane including the third gear 230 in contrast to FIG. 56. FIG. 58 is a cross-sectional view showing the tenth operation stage of the rotational driving force transmission mechanism 200 on the surface including the cam 244 and the hopper lever 270 in contrast to FIG. 57. FIG. 59 is a cross-sectional view showing the tenth operation stage of the rotational driving force transmission mechanism 200 on the surface where the hopper 121 is visible, in contrast to FIG. 58. FIG. 60 is a cross-sectional view showing the tenth operation stage of the rotational driving force transmission mechanism 200 on the surface including the locking lever 280 in contrast to FIG. 59. FIG. 61 is a cross-sectional view showing the tenth operation stage of the rotational driving force transmission mechanism 200 on the surface including the fourth gear 240 and the fifth gear 250 in contrast to FIG. 60. It is a perspective view which shows the positional relationship between each component in a 10th operation | movement stage.

Explanation of symbols

100 Inkjet recording device, 110 frame, 112 guide rail, 120 paper support, 121 hopper, 122 side support, 124 slide support, 130, 131 recording paper, 140 carriage, 141 flexible tube, 142 tube guide, 143 pulley, 144 timing belt 145 Carriage motor, 146 Cap, 148 Pump motor, 150 Transport drive gear, 152 Transport drive roller, 153 Transport driven roller, 160 Discharge drive gear, 162 Discharge drive roller, 164 Discharge cover, 170 Platen, 200 Transmission of rotational drive force Mechanism, 210 1st gear, 220 2nd gear, 230 3rd gear, 232 cavity, 235, 245 chipped portion, 236, 246 clearance groove, 240 1st Gear, 242 Locking pin, 244 Cam, 250 Fifth gear, 251 Bearing, 252 Feeding shaft, 253 Feeding roller, 260 Separation slope, 270 Hopper lever, 280 Locking lever, 290 Friction drive mechanism, 292 Friction member, 294 Spring, 296 Engaging groove

Claims (6)

A feeding device that feeds sheet-like objects to be fed one by one,
A feeding roller in contact with the material to be fed;
A driven shaft for rotationally driving the feeding roller;
A first gear having teeth formed on the peripheral surface and driven to rotate;
A second gear which has teeth formed on the peripheral surface and rotates by being transmitted with a driving force by meshing with the first gear;
It is arranged coaxially with the second gear, has teeth partially formed on its peripheral surface, rotates by friction drive by the second gear, and meshes with the first gear A third gear that is rotated by a driving force transmitted from the first gear,
A fourth gear that is arranged coaxially with the third gear and has teeth formed on a peripheral surface partially including a missing tooth portion, and rotates integrally with the third gear;
A fifth gear having teeth formed on the peripheral surface and rotating the driven shaft by transmitting a driving force from the fourth gear when meshed with the fourth gear;
Rotation regulating means for locking the rotation of the fourth gear for each rotation of the fourth gear,
When the locking of the fourth gear by the rotation restricting means is released, the third gear frictionally driven by the second gear meshes with the first gear, and the fourth gear is the fifth gear. Engaged with the gear, the driving force of the first gear is transmitted to the driven shaft via the third gear and the fourth gear, whereby the material to be fed is fed by the feeding roller,
When the rotation restricting means stops the rotation of the fourth gear, the chipped portion of the third gear faces the first gear, thereby disengaging the first gear and the third gear. In addition, when the chipped gear portion of the fourth gear faces the fifth gear, the meshing of the fourth gear and the fifth gear is released, and the feeding roller freely rotates. Feeding device.   The third gear has a cylindrical cavity having an axis parallel to the rotation axis of the third gear, is accommodated in the cavity, and is arranged in the radial direction of the third gear. The friction member which is urged | biased toward the outer side, contact | abuts to the internal peripheral surface of the said cavity, and engages with the said 2nd gearwheel and rotates integrally with respect to the said 2nd gearwheel. Feeding device. In the friction member, the position where the rotational driving force is transmitted from the second gear and the position where the rotational driving force abuts on the third gear and transmits the rotational driving force are not targeted with respect to the rotation shaft of the third gear. Placed in
When the feeding roller rotates forward to feed the material to be fed, a larger frictional force is generated from the friction member than the third gear than when the feeding roller is in a freely rotating state. The feeding device according to claim 2, which acts on the apparatus.   The fourth gear includes a cam that rotates integrally, and the cam shifts a hopper that presses the material to be fed toward the feeding roller when the feeding roller is driven to rotate. Item 2. The feeding device according to Item 1. A first gear having teeth formed on the peripheral surface and driven to rotate;
A second gear which has teeth formed on the peripheral surface and rotates by being transmitted with a driving force by meshing with the first gear;
It is arranged coaxially with the second gear, has teeth partially formed on its peripheral surface, rotates by friction drive by the second gear, and meshes with the first gear A third gear that is rotated by a driving force transmitted from the first gear,
A fourth gear that is arranged coaxially with the third gear and has teeth formed on a peripheral surface partially including a missing tooth portion, and rotates integrally with the third gear;
A fifth gear that has teeth formed on a peripheral surface and rotates the driven shaft by transmitting a driving force from the fourth gear when meshed with the fourth gear;
Rotation regulating means for locking the rotation of the fourth gear for each rotation of the fourth gear,
When the rotation restricting means stops the rotation of the fourth gear, the chipped portion of the third gear faces the first gear, thereby disengaging the first gear and the third gear. And when the chipped gear portion of the fourth gear faces the fifth gear, the engagement of the fourth gear and the fifth gear is released,
When the locking of the fourth gear by the rotation restricting means is released, the third gear frictionally driven by the second gear meshes with the first gear, and the fourth gear is the fifth gear. A rotational driving force transmission mechanism that meshes with the gear and that transmits the driving force of the first gear to the driven shaft via the third gear and the fourth gear. A feeding unit that feeds sheet-like objects to be fed one by one;
A liquid ejecting apparatus that ejects liquid to the object to be fed fed by the feeding unit,
The feeding unit is
A feeding roller in contact with the material to be fed;
A driven shaft for rotationally driving the feeding roller;
A first gear having teeth formed on the peripheral surface and driven to rotate;
A second gear which has teeth formed on the peripheral surface and rotates by being transmitted with a driving force by meshing with the first gear;
It is arranged coaxially with the second gear, has teeth partially formed on its peripheral surface, rotates by friction drive by the second gear, and meshes with the first gear A third gear that is rotated by a driving force transmitted from the first gear,
A fourth gear that is arranged coaxially with the third gear and has teeth formed on a peripheral surface partially including a missing tooth portion, and rotates integrally with the third gear;
A fifth gear having teeth formed on the peripheral surface and rotating the driven shaft by transmitting a driving force from the fourth gear when meshed with the fourth gear;
Rotation regulating means for locking the rotation of the fourth gear for each rotation of the fourth gear,
When the locking of the fourth gear by the rotation restricting means is released, the third gear frictionally driven by the second gear meshes with the first gear, and the fourth gear is the fifth gear. Engaged with the gear, the driving force of the first gear is transmitted to the driven shaft via the third gear and the fourth gear, whereby the material to be fed is fed by the feeding roller,
When the rotation restricting means stops the rotation of the fourth gear, the chipped portion of the third gear faces the first gear, thereby disengaging the first gear and the third gear. In addition, when the chipped gear portion of the fourth gear faces the fifth gear, the meshing of the fourth gear and the fifth gear is released, and the feeding roller freely rotates. Liquid ejector.

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